How soon can a blood test detect pregnancy
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Third trimester blood tests during pregnancy!
When to get a blood test for pregnancy
Routine blood tests during the first trimester of pregnancy
1. Blood type, Rh factor, and antibody screening
At your first prenatal visit, your practitioner will check your blood type to see whether it's type O, A, B, or AB, and whether it's Rh-negative.
If you're Rh-negative (15 percent of people are), you'll get a shot of Rh immune globulin (Rhogam) at least once during your pregnancy, and another after you give birth if your baby turns out to be Rh-positive.
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This shot will protect you from developing antibodies that could be dangerous during this pregnancy or (more likely) in future pregnancies.
(In your first pregnancy, your body will make only a small number of antibodies, which may not cause a problem. In later pregnancies, your body will make more.) These antibodies attack fetal red blood cells, causing fetal anemia.
Your blood will also be checked for Rh antibodies as well as some other antibodies that may affect your pregnancy.
If you have these at the start of pregnancy, your doctor will monitor the levels
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